Communication system and method of performing multi-cell common operation

Abstract

A common operating set including a plurality of cells may be set, and common radio resources may be allocated to enable the plurality of cells to perform a multi-cell common operation. Unique uplink radio resources may be allocated to each of terminals in the common operating set within the common radio resources, and each of the terminals may transmit corresponding uplink feedback information to a plurality of base stations based on corresponding unique uplink radio resources. Accordingly, each of the base stations may recognize information associated with a wireless environment between each of terminals and a corresponding base station.

The invention claimed is: 
     
       1. A method of operating a central controlling apparatus, the method comprising:
 setting a common operating set comprising a plurality of cells that perform a multi-cell common operation related to either interference control or network topology control; 
 allocating unique uplink radio resources to each of multiple terminals in the common operating set among common radio resources allocated in advance for the common operating set, to enable each of the terminals to transmit corresponding uplink feedback information to a plurality of base stations; and 
 collecting uplink feedback information of each of the terminals from each of the plurality of base stations, the uplink feedback information comprising information associated with a wireless environment of a corresponding terminal and a corresponding base station. 
 
     
     
       2. The method of  claim 1 , further comprising processing the collected uplink feedback information to perform the interference control and the network topology control. 
     
     
       3. The method of  claim 1 , wherein the allocating allocates, to each of the terminals, identical time resources, identical frequency resources, and different code resources within the common radio resources allocated in advance. 
     
     
       4. The method of  claim 1 , further comprising determining transmission power of the terminals based on a spatial area of the common operating set. 
     
     
       5. The method of  claim 1 , wherein the setting sets the common operating set based on either a current topology of the network or a cooperation status among the plurality of cells. 
     
     
       6. The method of  claim 1 , wherein the uplink feedback information of each of the terminals comprises information associated with a channel between a corresponding terminal and a corresponding base station. 
     
     
       7. The method of  claim 1 , further comprising:
 allocating unique downlink radio resources to each of the plurality of base stations among the common radio resources allocated in advanced for the common operating set, to enable terminals in the common operating set to receive corresponding control information from the plurality of base stations; and 
 requesting each of the plurality of base stations to broadcast of the corresponding control information. 
 
     
     
       8. A non-transitory computer-readable recording medium storing a program implementing the method of  claim 1 . 
     
     
       9. A method of operating a base station, the method comprising:
 receiving, from a central controlling apparatus, a request for uplink feedback information after a common operating set is set, the common operating set comprising a plurality of cells that perform a multi-cell common operation related to interference control or network topology control; 
 allocating unique uplink radio resources to each of multiple terminals included in a target cell from common radio resources allocated in advance for the common operating set, to enable each of the terminals included in the target cell among terminals in the common operation set to transmit corresponding uplink feedback information to a plurality of base stations; and 
 receiving uplink feedback information of each of the terminals in the common operating set. 
 
     
     
       10. The method of  claim 9 , further comprising reporting, to the central controlling apparatus, about the received uplink feedback information. 
     
     
       11. The method of  claim 10 , further comprising:
 receiving, from the central controlling apparatus, a request related to either the interference control or the network topology control; and 
 controlling wireless parameters related to the request about either the interference control or the network topology control. 
 
     
     
       12. A non-transitory computer-readable recording medium storing a program implementing the method of  claim 9 . 
     
     
       13. A method of operating a terminal, the method comprising:
 receiving a request, from a serving base station, for uplink feedback information after a common operating set is set, the common operating set comprising a plurality of cells that perform a multi-cell common operation related to interference control or network topology control; 
 recognizing unique uplink radio resources allocated to a target terminal and transmission power of the target terminal, the unique uplink radio resources being allocated to the target terminal from common radio resources allocated in advance for the common operating set; and 
 transmitting, to a plurality of base stations in the common operating set, corresponding uplink feedback information using the unique uplink radio resources and the transmission power. 
 
     
     
       14. A non-transitory computer-readable recording medium storing a program implementing the method of  claim 13 . 
     
     
       15. A method of operating a central controlling apparatus, the method comprising:
 setting a common operating set comprising a plurality of cells that perform a multi-cell common operation related to uplink synchronization; 
 allocating a unique ranging code to each of multiple terminals included in a common operating set from common radio resources allocated in advance for the common operation set; 
 transmitting a ranging report message to a plurality of base stations in the common operating set to report that a target terminal performs ranging; 
 collecting information associated with a unique ranging code of the target terminal from each of the plurality of the base stations, the information associated with the unique ranging code of the target terminal being received by each of the plurality of base stations; 
 setting an uplink synchronization between each of the plurality of base stations and the target terminal based on the information associated with the unique ranging code of the target terminal; and 
 providing information associated with the set uplink synchronization to the target terminal. 
 
     
     
       16. The method of  claim 15 , further comprising selecting a target base station for handover of the target terminal from a known uplink synchronization set comprising the plurality of base stations, the uplink synchronization of each of the plurality of base stations being known to the target terminal. 
     
     
       17. The method of  claim 16 , wherein the selecting selects the target base station for handover of the target terminal from a candidate set comprising at least one of the plurality of base stations in the known uplink synchronization set, the at least one base station having a signal strength greater than or equal to a predetermined level. 
     
     
       18. The method of  claim 15 , wherein the allocating allocates, to each of the terminals included in the common operating set, identical time resources, identical frequency resources, and different unique ranging codes, within the common radio resources allocated in advance. 
     
     
       19. The method of  claim 15 , wherein the information associated with the unique ranging code of the target terminal comprises the unique ranging code of the target terminal received by each of the plurality of base stations, and a cell identifier of each of the plurality of base stations. 
     
     
       20. A non-transitory computer-readable recording medium storing a program implementing the method of  claim 15 .